Wrench.



PATENTED FEB. 10, 1903.

I N. LARSEN.

WRENCH.

APPLIOATIQN 11.31) JULY 2, 1902.

N0. MODEL.

' UNITED STATES PATENT OFFICE.

NILS LARSEN, OF PARKRIDGE, NEW JERSEY, ASSIGNOR ,TO THE WIDNESS MANUFACTURING COMPANY, OF PARKRIDGE, NEW JERSEY, A CORPO- RATION OF NEW JERSEY.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 720,530, dated February 10, 1903.

I Application filed July 2,1902. Serial No. 114,066- (No model.)

To aZZ whom it may concern Be it known that I, NILS LARSEN, a citizen of the United States, and a resident of Park ridge, in the county of Bergen and State of New Jersey, have invented a new and useful Improvement in Wrenches, of which the fol lowing is a specification.

My invention relates to an improvement in wrenches, and has for its object to provide a wrench which is suitable for use on nuts,

bolt-heads, or other objects of polygonal or flat-sided form or on pipes or other objects of round form.

A further object is to provide a wrench of Y the above character which maybe very quickly adjusted to the article which it is intended to engage and which may be easily disengaged from the said article when so desired.

A practical embodiment of my invention is represented in the accompanying drawings,

in which Figure 1 is a view in side elevation of my improved wrench, showing it applied to a pipe,

a portion of the handle of the wrench being broken away. Fig. 2 is a rear view of the same. Fig. 3 is a partial sectional view showing the interior arrangement of the parts. Fig. 4 is a partial side view of a modified form in which the handle is substantially in 0 line with the jaws. Fig. 5 is a detail view of the spring-actuated pawl; and Figs. 6 and 7 are side and edge views, respectively, of the.

5 the stationary jaw 5 may be provided with serrations 7 for insuring a firm grip upon the article engaged by the wrench. The stock 6 of the stationary jaw is provided with a loop 8, through which the shank 2 of the movable 5o jaw is fitted to freely slide.

A ratchet-pinion 9 is located within a recess 10, formed in the stock of the stationary jaw, which pinion meshes with the rack 3 on the shank of the movable jaw. The journals 11 of the pinion 9 are mounted in the side walls of the stock 6inhalf-bearings 12, which open into holes 13 in the cheeks of the loop 8. These holes 13 are of sufficient size to permit the insertion and removal of the pinion 9 when the shank of the movable jaw has been withdrawn from the loop.

. A spring-actuated pawl 14: is mounted in the stock of the stationary jawin position to engage the ratchet-pinion 9. The arrangement between the pawl and ratchet-pinion is such that the movable jaw may be freely moved inwardly toward the stationary jaw, but will be locked against outward movement. This spring-actuated pawl 14. is fitted to slide longitudinally by means of a shank 15, which slides in a socket 16 in the stock of the stationary jaw, and the pawl is held yieldingly in engagement with the ratchet-pinion by means of a spring 17. The spring-actuated pawl 14. is provided with means for permitting the pawl to be positively withdrawn from engagement with the pinion when so desired for permitting the free outward movement of the movable jaw. The means which I have shown herein comprises two cars or lugs 18, So which extend laterally from the pawl 14 through" the side walls of the stock of the stationary jaw, which ears or lugs are guided in elongated recesses 19 in the said side walls.

The back edge of the shank of the movable 8 5 member bears at a single point against theinner face of the back wall 20 of the loop 8,

so as to permit a slight rocking movement of the two jaws with respect to each other as they are gripped to the article, the rocking 0 motion beingsufficient to account for the distance between two teeth in the rack 3.

In Figs. 1, 2, and 3 I have shown a wrench in which the handle extends at substantially right angles to the gripping-facesof the jaws, While in Fig. 4. I have, shown the handle as extended substantially in the same line as the said gripping-faces of the jaws. This last form is more particularly applicable for use where a number of pipes are in such close proxim- I00 ity to each other as to prevent the insertion of the movable jaw between them.

It is evident that changes might be resorted to in the form, construction, and arrangement of the several parts without departing from the spirit and scope of my invention. Hence I do not wish to limit myself strictly to the structure herein set forth; but

What I claim is- 1. A wrench comprising a stock on which is a fixed jaw, a movable jaw having a toothed rack which works through the said stock, a

ratchet-pinion located in said stock and engaged with the said rack, a spring-actuated pawl engaging the said pinion, and means for disengaging the said pawl from the pinion comprising logs or ears projected laterally through the opposite side walls of the stock, substantially as set forth.

2. A wrench comprising a stock carrying the stationary jaw and provided with a loop, a movable jaw having a shank fitted to slide through the loop and having a toothed rack, holes in the cheeks of the loop, half-bearings opening into the holes and a ratchet-pinion mounted in said half-bearings in engagement with the said toothed rack, the said ratchetpinion being removable through one of the said holes when the shank of the movable jaw is removed from the loop, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 12th day of June,

NILS LARSEN.

Witnesses:

FREDK. HAYNES, O. S. SUNDGREN. 

